Unlearn OOP (if you want to learn FP)

Keynote at the Italian Kolin Community Conference 2019

Transcript

1. Unlearn Object Oriented Programming (if you want to learn Functional Programming) Uberto Barbini ramtop @
2. When I was a kid I wanted to become a Naturalist
3. I kept reading books about Natural Sciences
4. I kept reading books about Natural Sciences
5. I kept reading books about Natural Sciences
6. Classification was simple...
7. Then Cladistic arrived... Common ancestors
8. And birds became dinosaurs!
9. We are all fish, technically
10. Scientists are humans...
12. https://pixabay.com/users/endriqstudio-13819715/ https://pixabay.com/users/endriqstudio-13819715/
13. It’s not easy to Unlearn
15. https://pixabay.com/users/sasint-3639875/ https://pixabay.com/users/sasint-3639875/ Object Oriented vs Functional
22. Thou Shalt Have No Manager Class
28. Credits https://pixabay.com/users/sasint-3639875/ Credits https://pixabay.com/users/sasint-3639875/ The Elephant in the room
30. Object-Oriented Functional
31. Url Shortener
32. Url Shortener
33. Unlearn What seems What seems wrong wrong but it’s but it’s right right? ? What seems What seems right right but it’s but it’s wrong wrong? ?
35. Well Defined Types
37. Generics are Type builders
39. Anemic Objects Immutable Data
41. Don’t use Exceptions as result
43. Side effects should be left out
45. Function types instead of Interfaces
47. Which Language or Library should I use?
48. The ones that spark joy!
49. Where should I start in an existing Legacy Project?
50. https://pixabay.com/users/1588877-1588877/ Small changes
52. Unlearn is difficult Functional Programming is made of Arrows Look at your code with new eyes (plus we are fish)
53. Excuses to avoid learning FP: It’s just a bunch of funny words I don’t have time What’s the point?
54. Tell me your Questions! Uberto Barbini @ramtop Blog https://medium.com/@ramtop Book: https://tinyurl.com/funkotlinbook